Unusually slow?
#1
10 Second Club
Thread Starter
iTrader: (13)
Join Date: Mar 2006
Location: Baytown, TX
Posts: 228
Likes: 0
Received 0 Likes
on
0 Posts
Unusually slow?
I was wondering what you guys think... I think my truck is unusally slow for my mods. 99 ECSB 4x4 with an 05 5.3 w/ <10k miles. Mods in my sig. Race weight of ~5400lbs.
I ran the first run of the night on the 35s and got a 16.2.
The rest of the night I was on stock tires and fastest time was 16.18 @ 82...
Does anybody else think somethings wrong?
I ran the first run of the night on the 35s and got a 16.2.
The rest of the night I was on stock tires and fastest time was 16.18 @ 82...
Does anybody else think somethings wrong?
#2
TECH Addict
iTrader: (7)
Join Date: May 2004
Location: (281)-(713)-(832)
Posts: 2,558
Likes: 0
Received 0 Likes
on
0 Posts
I was wondering what you guys think... I think my truck is unusally slow for my mods. 99 ECSB 4x4 with an 05 5.3 w/ <10k miles. Mods in my sig. Race weight of ~5400lbs.
I ran the first run of the night on the 35s and got a 16.2.
The rest of the night I was on stock tires and fastest time was 16.18 @ 82...
Does anybody else think somethings wrong?
I ran the first run of the night on the 35s and got a 16.2.
The rest of the night I was on stock tires and fastest time was 16.18 @ 82...
Does anybody else think somethings wrong?
What does the rest of your slip look like? You should at least be mid 15s at 5400 lbs.
#4
2nd fastest 5.3 ECSB
iTrader: (14)
I was wondering what you guys think... I think my truck is unusally slow for my mods. 99 ECSB 4x4 with an 05 5.3 w/ <10k miles. Mods in my sig. Race weight of ~5400lbs.
I ran the first run of the night on the 35s and got a 16.2.
The rest of the night I was on stock tires and fastest time was 16.18 @ 82...
Does anybody else think somethings wrong?
I ran the first run of the night on the 35s and got a 16.2.
The rest of the night I was on stock tires and fastest time was 16.18 @ 82...
Does anybody else think somethings wrong?
Originally Posted by Mods in sig
99 Sierra Z71 ECSB 5.3
Pacesetter LTs and ORY, Flowmaster muffler, K&N, vette servo, LS1 E-fans, Nelson tune, 3" body lift, TB crank, Eagle 058's, 305/70R16 M/Ts
Pacesetter LTs and ORY, Flowmaster muffler, K&N, vette servo, LS1 E-fans, Nelson tune, 3" body lift, TB crank, Eagle 058's, 305/70R16 M/Ts
#5
TECH Addict
iTrader: (7)
Join Date: May 2004
Location: (281)-(713)-(832)
Posts: 2,558
Likes: 0
Received 0 Likes
on
0 Posts
Yeah, that's unuasually slow. Is it doing anything odd...like bogging in the high rpm? When's the last time you changed the fuel filter/plugs ect..? Throwing any codes? Tranny slipping?
Get that slip up when you can it will help.
Get that slip up when you can it will help.
#6
10 Second Club
Thread Starter
iTrader: (13)
Join Date: Mar 2006
Location: Baytown, TX
Posts: 228
Likes: 0
Received 0 Likes
on
0 Posts
It feels like it doesn't pull very hard in 3rd. No slippage though. I pulled plugs, they look good. I changed them when we put the motor in, bout 4-5k miles ago. Filter is maybe 3-4 months old. Not throwing any codes.
I don't notice any drivability issues under normal driving conditions though. I put it on a scanner and everything seems to be working properly. I'm wondering if something is wrong in my tune.
I don't notice any drivability issues under normal driving conditions though. I put it on a scanner and everything seems to be working properly. I'm wondering if something is wrong in my tune.
Last edited by TXMaro; 02-18-2008 at 02:12 PM.
#7
TECH Addict
iTrader: (7)
Join Date: May 2004
Location: (281)-(713)-(832)
Posts: 2,558
Likes: 0
Received 0 Likes
on
0 Posts
It feels like it doesn't pull very hard in 3rd. No slippage though. I pulled plugs, they look good. I changed them when we put the motor in, bout 4-5k miles ago. Filter is maybe 3-4 months old. Not throwing any codes.
I don't notice any drivability issues under normal driving conditions though.
I don't notice any drivability issues under normal driving conditions though.
What was the weather like when you ran?
What rpm are you shifting at? Is your tune updated to the mods you have? Do you still have the 99 pcm in there? On stock tires with 4.56s you are hitting 3rd around 68mph, so yea it should feel pretty slow. The MAIN thing that's throwing me is gaining pretty much nothing after swapping from 35's to stock wheels/tires.
Sorry for all the questions, but it may be something small as a bad plug or filter slowing you down. Just gotta take everything into consideration.
Trending Topics
#8
10 Second Club
Thread Starter
iTrader: (13)
Join Date: Mar 2006
Location: Baytown, TX
Posts: 228
Likes: 0
Received 0 Likes
on
0 Posts
The filter was dirty.. I'm actually cleaning it now. Weather was about as good as it gets down here.. clear skies, pretty dry, ~mid 70s?.... Shifting around 57-5800. Tune is updated, except theres still a problem with the new gears and tires. Throwing an ABS light still, but retune is on its way. Still a 99 PCM... Do you think that could be an issue? I'm using my 99 fuel rail w/ 05 injectors and 99 throttle cable. I went through the traps around 3700-4000 in 3rd.
#9
TECH Addict
iTrader: (7)
Join Date: May 2004
Location: (281)-(713)-(832)
Posts: 2,558
Likes: 0
Received 0 Likes
on
0 Posts
For reference here is a timeslip of my ecsb with 5.3, no cats, bullet muffler, stock gears, hypershitter, stock clutch fan, and a fram filter. I was around 800 lbs lighter than you though.